import Vue from "vue";
import VueRouter from "vue-router";

import Login from '../components/Login.vue' //注意 ../
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import User from '../components/user/User.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'
import Cate from '../components/goods/Cate.vue'
import Params from '../components/goods/Params.vue'
import List from '../components/goods/List.vue'
import Add from '../components/goods/Add.vue'
import Order from '../components/order/order.vue'
import Report from '../components/report/Report.vue'


Vue.use(VueRouter);

const routes = [
  { path: '/', redirect: '/login' },  //重定向
  { path: '/login', component: Login },
  {
    path: '/home',
    component: Home,
    redirect:'/welcome',  //首页重定向
    children: [
      { path: '/welcome', component: Welcome },
      { path: '/users', component: User },
      { path: '/rights', component: Rights },
      { path: '/roles', component: Roles },
      { path: '/categories', component: Cate },
      { path: '/params', component: Params },
      { path: '/goods', component: List },
      { path: '/goods/add', component: Add },
      { path: '/orders', component: Order },
      { path: '/reports', component: Report },

    ]
  }
];



const router = new VueRouter({
  routes
});

// 在路由对象router，挂载路由导航守卫控制访问权限
router.beforeEach((to, from, next) => {        //注意这一堆要放在router下面
  // 1，如果去的是登录页面，则直接跳转
  if (to.path === '/login') return next()   //注意return
  // 2，不是去登录页面，就获取本地token，没有token就跳转去登录页面
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  // 3，本地有token，就直接去要跳转的页面
  next()
  // to 将要访问的路径
  // from 代表从哪个路径跳转而来
  // next 是一个函数，表示放行
  //     next()  放行    next('/login')  强制跳转

})

export default router;
